Reply on RC2 DOI Creative Commons
Veleda Astarte Paiva Müller

Published: Dec. 27, 2023

Abstract. An asthenospheric window underneath much of the South American continent increases heat flow in Southern Patagonian Andes, where glacial-interglacial cycles drive building and melting Icefields since latest Miocene. The Last Glacial Maximum (LGM) was reached ~20000 years ago, an acceleration deglaciation rate is recorded Little Ice Age (LIA), ~400 ago. Fast uplift rates up to 41±3 mm/yr are measured by GNSS around Icefield currently ascribed post-LIA lithospheric rebound, but possible longer-term post-LGM rebound poorly constrained. These rates, addition, one order magnitude higher than those on other glaciated orogens (e.g., European Alps), which raises questions about role affecting vertical surface displacement rates. Here, we perform geodynamic thermo-mechanical numerical modelling estimate induced accounting for temperature dependent rheologies different thermal regimes asthenosphere. Our modelled maximum postglacial matches observed ratebudget only when both accounted if a standard continental mantle potential increased 150–200 °C. thus play key controlling presently Andes.

Language: Английский

Helium and natural hydrogen in the Bohai Bay Basin, China: Occurrence, resources, and exploration prospects DOI
Yongbo Wei, Quanyou Liu, Dongya Zhu

et al.

Applied Energy, Journal Year: 2025, Volume and Issue: 383, P. 125398 - 125398

Published: Jan. 21, 2025

Language: Английский

Citations

3
Accessing Magma: A Necessary Revolution in Earth Sciences and Renewable Energy DOI Creative Commons
Yan Lavallée, Jackie E. Kendrick, J. C. Eichelberger

et al.

European Review, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 23

Published: Feb. 10, 2025

Earth System Science stands as the future operating framework to monitor pulse of Earth, and diagnose address challenges global change. Magmatism volcanism are primary processes connecting solid atmosphere, hydrosphere, biosphere. In addition regulating system, they both an unavoidable source hazards a tremendous resource energy raw materials. Accessing magma is necessary next step in exploration our planet. It will enable us develop next-generation geothermal (magma energy), transform volcano monitoring strategies, perhaps even alleviate volcanic activity. Recent exploratory drilling activities around world have serendipitously encountered shallow bodies Earth. Following these remarkable occurrences, Krafla Magma Testbed (KMT) has been established Iceland order create first observatory – world-class international situ laboratory with access magma-rock-hydrothermal boundary through wells suitable for advanced studies experiments. Here we review importance present multifaceted need observatories introduce benefits KMT enter new generation demands resilience strategies.

Language: Английский

Citations

1
Iranian Neo-Tethyan Magmas as a Significant Co2 Source During the Middle Eocene Climate Optimum DOI
Léa Ostorero, Rosario Esposito, Pierre Bouilhol

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Role of Surface Processes and Mantle Plumes in the Formation of Microcontinents: Insights from Numerical Modeling and the Seychelles Microcontinent Case Study DOI
Zhijie Jia, Pietro Sternai, Jianbing Peng

et al.

Journal of Earth Science, Journal Year: 2025, Volume and Issue: 36(1), P. 233 - 249

Published: Feb. 1, 2025

Language: Английский

Citations

0
Refining paleoelevation estimates of the European Alps by simulating Middle Miocene climate and δ18O responses to diachronous surface uplift scenarios DOI Creative Commons
Daniel Boateng, Sebastian G. Mutz, Katharina Methner

et al.

Global and Planetary Change, Journal Year: 2025, Volume and Issue: unknown, P. 104808 - 104808

Published: April 1, 2025

Language: Английский

Citations

0
Role of surface processes and deep crustal rheology in the steady-state LongMenShan building: Insights from geodynamic modeling DOI
Hui Yang, Yuanze Zhou,

Hua Wu

et al.

Global and Planetary Change, Journal Year: 2025, Volume and Issue: unknown, P. 104894 - 104894

Published: May 1, 2025

Language: Английский

Citations

0
Topography Response to Horizontal Slab Tearing and Oblique Continental Collision: Insights From 3D Thermomechanical Modeling DOI Creative Commons
Giridas Maiti, Alexander Koptev, Paul Baville

et al.

Journal of Geophysical Research Solid Earth, Journal Year: 2024, Volume and Issue: 129(10)

Published: Oct. 1, 2024

Abstract The horizontal propagation of slab detachment (slab tearing) is known to control lateral migration the mountain uplift along collisional belt. However, along‐strike differential collision due an oblique passive margin geometry can make topography response more complex. In this study, we employ 3D thermomechanical modeling distinguish between driven by tearing and continental itself. our models, breakoff triggered transition from oceanic subduction, occurring earlier on one side than other initial configuration. once has begun, it spreads horizontally in form at high velocity (∼38–118 cm yr −1 ), associated topographic also propagates with same velocity. contrast, subsequent related typically much slower (∼2–34 ). Similarly, vertical magnitude surface caused higher (up 10 mm ) following phase (<4 parametric analysis reveals that depends obliquity angle age, whereas collision‐induced growth controlled convergence angle. Finally, show presence microcontinental block detached leads spatial temporal intense syn‐collisional building.

Language: Английский

Citations

3
Miocene climate cooling and aridification of Antarctica may have enhanced syn-extensional magmatism in the western Ross Sea DOI Creative Commons
Marco Fioraso, Pietro Sternai, Valerio Olivetti

et al.

Global and Planetary Change, Journal Year: 2024, Volume and Issue: 240, P. 104538 - 104538

Published: Aug. 12, 2024

Continental rift systems are commonly characterized by volcanism with parental basaltic magmas sourced from the mantle. Erosion of shoulders and sedimentation in adjacent basins can affect stress thermal fields at depth, thereby affecting partial mantle melting. However, sensitivity magmatic activity to such surface forcing is elusive. Geological observations western Ross Sea, Antarctica, suggest onset Cretaceous a transition wide-rifting narrow-rifting boundary between Antarctic craton Transantarctic Mountains. Miocene climate cooling during rifting addition, leads an abrupt decrease rate, synchronous emplacement McMurdo Volcanic Group. This represents largest alkali province worldwide, extending both inland offshore Mountains respectively. Here, we use coupled thermo-mechanical landscape evolution numerical modeling quantify melt production slowly stretching due changes erosion/deposition rates. The model combines visco-elasto-plastic deformation lithosphere underlying extension, rock melting, linear hillslope diffusion topography. parametric study covers range slow extension rates, crustal thicknesses, potential temperatures coefficients. Numerical simulations successfully reproduce ∼150–200-km-wide Sea Miocene-to-present asthenospheric (McMurdo Group). Results further show that rifts magmatism highly sensitive sediment deposition within basin, which inhibits decompression melting delays breakup. Regional climate-driven rate thus likely have affected syn-rift history supporting relevance interactions deep-seated processes across extensional settings.

Language: Английский

Citations

2
Subsurface microbial community structure shifts along the geological features of the Central American Volcanic Arc DOI Creative Commons
Marco Basili,

Timothy Rogers,

Mayuko Nakagawa

et al.

EarthArXiv (California Digital Library), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 5, 2024

Subduction of the Cocos and Nazca oceanic plates beneath Caribbean plate drives upward movement deep fluids enriched in carbon, nitrogen, sulfur, iron along Central American Volcanic Arc (CAVA). These compounds fuel diverse subsurface microbial communities that turn alter distribution, redox state, isotopic composition these compounds. Microbial community structure functions vary according to fluid delivery across arc, but less is known about how differ axis a convergent margin as geological features (e.g., extent volcanism subduction geometry) shift. Here, we investigate changes bacterial 16S rRNA gene amplicons geochemical analysis deeply-sourced seeps southern CAVA, where Ridge alters setting. We find shifts margin, with similar settings clustering together independently proximity sample sites. correlates variables such host rock type, maturity hydrothermal slab depth different segments CAVA. This reveals tight coupling between Earth processes activity, controlling margin.

Language: Английский

Citations

2
Fast uplift in the southern Patagonian Andes due to long- and short-term deglaciation and the asthenospheric window underneath DOI Creative Commons
Veleda Astarte Paiva Müller, Pietro Sternai, Christian Sue

et al.

Solid Earth, Journal Year: 2024, Volume and Issue: 15(4), P. 387 - 404

Published: April 3, 2024

Abstract. An asthenospheric window underneath much of the South American continent increases heat flow in southern Patagonian Andes where glacial–interglacial cycles drive building and melting Icefields since latest Miocene. The Last Glacial Maximum (LGM) was reached ∼26 000 yr BP (years before present). Significant deglaciation onsets between 21 17 were subject to an acceleration Little Ice Age (LIA), which ∼400 BP. Fast uplift rates up 41±3 mm yr−1 are measured by global navigation satellite system (GNSS) around Southern Icefield currently ascribed post-LIA lithospheric rebound, but possible longer-term post-LGM rebound is poorly constrained. These rates, addition, 1 order magnitude higher than those on other glaciated orogens (e.g. European Alps), raises questions about role affecting vertical surface displacement rates. Here, we perform geodynamic thermo-mechanical numerical modelling estimate induced deglaciation, accounting for temperature-dependent rheologies different thermal regimes asthenosphere. Our modelled maximum post-glacial matches observed rate budget only when both accounted if a standard continental mantle potential temperature increased 150–200 °C. thus plays key controlling presently Andes.

Language: Английский

Citations

2